Can you rattle off your facebook account number? Chances are, few people are more than semi-consciously aware that such a thing exists. Chances are the phone n

Can you rattle off your facebook account number? Chances are, few people are more than semi-consciously aware that such a thing exists. Chances are the phone number will remain, but it won't be important ... like Facebook, and like modern phones, you deliberately connect with someone. True with modern phones you do consciously give them a number whereas with Facebook you don't (even though it's the underlying account id #'s used by Facebook's infrastructure), but there are other options such as bumping someone's phone with yours to initiate transfer of some piece of data or other.